When Did Indians Become Straight was written by American Assistant Professor Mark Rifkin of the English Department at the University of North Carolina at Greensboro.
As I have discussed in a few other posts on my interests in the intersection of indigenous studies and queer theory, When Did Indians analyzes the social reproduction of native societies within the confines of American colonial struggle.
He follows two seemingly parallel process in American Indian societies: one of the cultivation of heteronormativity and patriarchy in these societies and the other being the struggle between traditional authority and colonial sovereignty.
As an English professor, his area of inquiry involves particular literary texts for which I am not so familiar but he also does a careful historical analysis of the contexts for these texts.
It's quite a long read but if you have an interest in colonialism and sexuality, this is definitely a book worth reading.
The version I read was a 440 page paperback published by Oxford University Press (January 27, 2011). The cheapest versions I saw online where amazon.com and abebooks.com.